package computer.close_computer_3;

//操作系统
public class System {

    private void saveCurrentTask() {
        //do saveCurrentTask
    }

    private void closeService() {
        //do closeService
    }

    private void closeScreen() {
        //do closeScreen
    }

    private void closePower() {
        //do closePower
    }

    public void close() {
        saveCurrentTask();
        closeService();
        closeScreen();
        closePower();
    }
}